//2009/07/20 17:37:57
#include<iostream>
#include<string>

using namespace std;

class Time
{
public:
   string whatTime(int seconds)
    {
		int hour = seconds/3600;
		seconds %= 3600;
		int minute= seconds/60;
		seconds %= 60;
		char ss[100];
		sprintf(ss, "%d:%d:%d",hour, minute, seconds);
		return ss;
    }
};
